Count how many times given word x repeats in text.
The phrasing of the Problem Statement is not correct. The string "When you finish ..., you will be told .... You can then .... You can also ...." contains FOUR instances of the WORD "you". "You", "YOU" and "you" are all examples of the _word_ "you". The Problem Statement should say that the player must find occurrences of the provided text-pattern of the same case within the given text.
Angle between two vectors
Return the first and last character of a string
Solve expression III
Set x value to each even index of vector y.
Calculate the sum of elements of n*n Hilbert matrix.
Display positive elements of matrix.
Find product of eigenvalues of n*n magic matrix.
Solve expression II
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